Jamb-supporting stay



Jan. 1, 1929.

1,697,456 I E. B. CARLSON JAMB SUPPORTING STA Y 7 Filed April 2, 1927 Gil Patented Jan. 1, 1929.

UNITED STATES EMIL 'CARLSDN, OF CHICAGO, ILLINOIS.

Jams-SUPPORTING STAY.

Application filed April 2,

My invention is concerned with the provision of certain improvements applicable to jamb supporting stays of the type shown and described in my prior Patent No.

5 1,599,985, dated September 14, 1926. I

A jamb stay of the type shown and described in my patent aforesaid is preferabl formed in one piece from metal strap and preferably comprises, as its essential 10 elements, an elongated flat body portion and a jamb entering element at one end of and at right angles to the body portion, the jamb entering element being bifurcated to rovide a pair of spaced pointed piercing gers, and the. body portion being perforated or otherwise adapted for attachment to a frame or margins of an opening wherein is mounted a door or window jamb engaged by the jamb entering element.

jamb stay embodying my present invention preferably comprises the essential elements in the last paragraph ment oned, and, in addition, is conformed to provide a transverse rib at the junction between the body portion and the jamb entering element,

this rib preferably being concavo-convex in cross section, with its convex surface at the exterior of the junction, this rib affording several advantages as will presently appear.

In the accompanying drawings, illustrating two embodiments of my invention:

Fig. 1 is a side elevational view, slightly enlarged, of a jamb stay embodying my invention;

Fig. 2 is an end elevational view of the device shown in Fig. 1;

Fig. 3 is atop plan view of the device shown in Figs. 1 and 2.

Similar characters of reference refer to similar parts throughout the several views.

Referring, first, to the device shown in Figs. 1 to 3, both inclusive, it will be noted that the jamb stay of my invention is formed from a single piece of metal strap and comprises an elongated flat body portion 10 and a jamb entering element 11,the jamb entering element being disposed at one end of and at right angles to the body portion. The jambentermg element is bifurcated to provide a pair of pointed spaced piercing fingers 12, 12. It will be noted that the piercing fingers are provided with inclined opposed edge portions a, a which,

without meeting, converge toward the body 1927. Serial No. 180,434.

vided with a plurality of perforations 13,

13 .to receive nails or other instrumentalities for attaclung the said body portlon to a frame, or the niarglns of an opemng,

, wherein is mounted to a door jamb, or the like which is engaged by the jamb entering element of the stay.

The body portion 10 is preferably provided with means for positioningand indicating the position of thejamb stay with respect to a door jamb or other structure to which the j amb stay is attached, such means preferably taking the form of a stop element 14 which is struck from the metal of the body portion 10, as illustrated in the drawings, and is turned at-right angles to the body portion and into parallelism with the piercing fingers of the jamb entering element. The stop element 14 is definitely spaced from the piercing fingers and is somewhat longer than the piercing fingers so that the latter may be accurately positioned in a door jamb or the like by moving the lower end of the stop element against the edge of the jamb into which the piercing fingers are to be driven.

' I have not, in the drawings, illustrated the manner of using my improved jamb stay in connection with a door or window jamb because the preferred manner of using jamb stays of this kind is now known, bemg fully shown and described in my patent aforesaid.

Itwill be noted that the jamb stay of my The rib- 15 afiords several distinctive adortion 10. The piercing fingers are also vantages. It strengthens the stay at the junction between the body portion and the jamb entering element. It serves to receive, on its convexsurface, the force of the blow of a hammer or other tool utilized in driving the piercing fingers into a jamb or the like and delivers the force of the blow to the piercing fingers much more efliciently and satisfactorily than would be the case were the force of the blow distributed over any considerable area or over any area not substantially behind the points of the piercing fingers. The rib 15 has a further advantage in that its concave surface serves as a recess to receive material which may be displaced when the piercing fingers are driven to position, this being an important consideration when the material into which the piercin fingers are driven is soft wood, plaster, wal board or other relatively soft material.

When the jamb entering element is driven into a piece of wood or the like, say for instance a door jamb, the fingers 12,12 spring apart somewhat, due to the presence of their opposed inclined edge portions a, a, the fingers reacting to clamp the-wood or other material between them, and behind their pointed shoulders, when the jamb entering element has been driven to final position.

The jamb stay is preferably formed'with a slot between the prongs, said slot extending upward and backward into the rib or corrugation 15 to divide said corrugation into two independent portions. .The bases of the piercing fingers are thus divided and spaced apart where they join the body portion, and the transverse rib is divided into two portions which, in the drawing, have been designated 15 and 15. The rib portions 15 and 15" may, if desired, be considered parts of the piercing fingers bases.

WVhen the rib portions are so regarded the piercing fingers pro erly may be said to extend beyond the b0 y portion 10 on the side thereof which lies away from the points of the piercing fingers.

The rib portions 15 and 15" of the device may be utilized to cause the points of the piercing fingers to be forcibly spread apart to a certain extent by the force of the blow or blows whereby the piercing fingers are driven into a jamb or the like. Thus,-when in driving the piercing fingers to position in a piece of wood, the hammer is caused to engage the stay most forcibly at the inner (opposed) ends of the rib portions 15 and 15", the said rib portions will flatten out at their said inner or opposed ends, with the result that the points of the piercing fingers will be spread-apart in the wood. This flattening of the inner or opposed ends of the rib portions may be accomplished with an ordinary hammer or. a special tool may be utilized for the purpose.

Having thus illustrated and described two embodiments of my invention, what I claim as new and desire to secure by United States Letters Patent is:

1. A metallic fastener for jambs and the like comprising a stiff metallic main body portion adapted to space a jamb from a supporting member, and having a pair of prongs formed at one end and extending at an angle to said main body portion, said body portion being formed with a transverse corrugation projecting above said main body portion in a direction opposite to the ends of said prongs,

forming a recess on the under side of said body portion, and said prongs being separated by a slot dividing said corrugations into two independent portions.

2. A metallic fastener for jambs and the like comprising a stiff metallic main body portion adapted to space a jamb from a supporting member, and having a pair-of prongs formed at one end and extending at an angle to said main body portion, said body portion being formed with a transverse corrugation projecting above said main body portion in a direction opposite to the ends of said prongs, forming a recess on the under side of said body portion, and said prongs being sep arated by a slot dividing said corrugation In witness whereof, I hereunto subscribe my name this 31st day of March, 1927.

' EMIL B. CARLSON. 

